Commands by windfold

Commands by windfold (5)

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Generate Sha1, MD5 hash using echo

This is mostly for my own notes but this command will compute a md5 message digest from the command line. You can also replace md5sum with other checksum commands (e.g., sha1sum) Show Sample Output
This is sample output - yours may be different.
```
echo -n "password"|md5sum|awk '{print $1}'
5f4dcc3b5aa765d61d8327deb882cf99
```
3

echo -n "password"|md5sum|awk '{print $1}'

windfold · 2011-11-08 21:34:50 6
Bulk renames with find, sed and a little escaping

This command is a more flexible than my previous submission. It will work with spaces however suuuuper hacky and ugly. Source: http://www.unix.com/shell-programming-scripting/146173-find-rename-files-using-find-mv-sed.html Show Sample Output
This is sample output - yours may be different.
```
foobar1 gets renamed to barbar1
barfoo2 gets renamed to barbar2
fooobarfoo gets renamed to barobarfoo
```
1

find . -exec bash -c "mv '{}' '\`echo {} |sed -e 's/foo/bar/g'\`"' \;

windfold · 2011-05-07 15:41:07 4
Email yourself after a job is done

This is a two part command that comes in really handy if you're running commands that take longer than you're willing to wait. The commands are separated by the semicolon(;) The first command is whatever you're attempting to do. The second commands emails you after the job completes. Show Sample Output
This is sample output - yours may be different.
```
mysqldump -A; echo "job done"|mail 5551231234@vzwpix.com -s'job done'
sends a txt message to your phone tell you the job is done.
```
5

<command>; echo "job done"|mail email@email.com -s'job done'

windfold · 2011-05-05 18:13:17 13
bulk rename files with sed, one-liner

Renames all files in a directory named foo to bar. foobar1 gets renamed to barbar1 barfoo2 gets renamed to barbar2 fooobarfoo gets renamed to barobarfoo NOTE: Will break for files with spaces AND new lines AND for an empty expansion of the glob '*'
This is sample output - yours may be different.
4

ls * | sed -e 'p;s/foo/bar/' | xargs -n2 mv

windfold · 2011-04-30 00:21:10 12
Create a tar of modified/added files since revision 1792.

The result of this command is a tar with all files that have been modified/added since revision 1792 until HEAD. This command is super useful for incremental releases.
This is sample output - yours may be different.
0

svn diff -r 1792:HEAD --summarize | awk '{if ($1 != "D") print $2}'| xargs -I {} tar rf incremental_release.tar {}

windfold · 2011-04-05 15:00:49 4

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Simple colourized JSON formatting for BASH

Leave out pygmentize or `pip install pygments` first.

Hide the name of a process listed in the `ps` output

$ exec -a $NAME $COMMAND $ARGS `your_cmd -erase_all_files` is the real process, but harmless-looking getty appears in the process table. Never actually had a need to do this, but interesting nonetheless... Tested in bash, dash. $ -a $NAME "pass NAME as the zeroth argument to COMMAND", i.e. customise the name of the process (as commonly seen with `ps`)

Validate date, also a date within a leap year

Important to know: a valid date will return 0, otherwise 1!

Create commands to download all of your Google docs

Create commands to download all of your Google docs to the current directory.

Recover a deleted file

grep searches through a file and prints out all the lines that match some pattern. Here, the pattern is some string that is known to be in the deleted file. The more specific this string can be, the better. The file being searched by grep (/dev/sda1) is the partition of the hard drive the deleted file used to reside in. The ?-a? flag tells grep to treat the hard drive partition, which is actually a binary file, as text. Since recovering the entire file would be nice instead of just the lines that are already known, context control is used. The flags ?-B 25 -A 100? tell grep to print out 25 lines before a match and 100 lines after a match. Be conservative with estimates on these numbers to ensure the entire file is included (when in doubt, guess bigger numbers). Excess data is easy to trim out of results, but if you find yourself with a truncated or incomplete file, you need to do this all over again. Finally, the ?> results.txt? instructs the computer to store the output of grep in a file called results.txt. Source: http://spin.atomicobject.com/2010/08/18/undelete?utm_source=y-combinator&utm_medium=social-media&utm_campaign=technical

GRUB2: Set Imperial Death March as startup tune

Kudos to http://www.commandlinefu.com/commands/view/8275/grub2-set-super-mario-as-startup-tune

Convert multiple pdf's to jpg in linux using the convert command

back ssh from firewalled hosts

host B (you) redirects a modem port (62220) to his local ssh. host A is a remote machine (the ones that issues the ssh cmd). once connected port 5497 is in listening mode on host B. host B just do a ssh 127.0.0.1 -p 5497 -l user and reaches the remote host'ssh. This can be used also for vnc and so on.

Find out my Linux distribution name and version

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

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